package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 对前端传来的明文密码进行 md5 加密处理
        password =  DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {

        System.out.println("EmployeeServiceImpl save 当前线程id：" + Thread.currentThread().getId());

        Employee employee = new Employee();

        // 对象属性拷贝
        // (源, 目标)
        BeanUtils.copyProperties(employeeDTO, employee);

        // 设置账号状态   1 表示正常  0 表示锁定
        employee.setStatus(StatusConstant.ENABLE);

        // 设置密码 默认密码123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

/*
        // 设置当前记录的 创建时间 和 修改时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        // 设置当前记录 创建人id 和 修改人id
        // 还待完善 需要更改为当前登录用户 id  —— 已完善
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());
*/

        // 插入持久层
        employeeMapper.insert(employee);

    }

    /**
     * 分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        // select * from employee limit 0, 10

        // 引入 com.github.pagehelper 插件
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        // 插件规定 使用 page
        Page<Employee> page =  employeeMapper.pageQuery(employeePageQueryDTO);

        // 获取总记录数
        long total = page.getTotal();
        // 获取查询出的 数据
        List<Employee> records = page.getResult();

        return new PageResult(total, records);

    }

    /**
     * 启用禁用员工账号
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        // update employee set status = ? where id = ?

        // 构造实体
        // 1、传统写法
/*        Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);
        */

        // 构造者方法
        Employee employee = Employee.builder()
                        .status(status)
                        .id(id)
                        .build();

        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("*****");  // 隐藏密码
        return employee;
    }

    /**
     * 编辑员工信息
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {

        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
/*
        // 设置修改时间
        employee.setUpdateTime(LocalDateTime.now());
        // 设置修改人
        employee.setUpdateUser(BaseContext.getCurrentId());
*/

        employeeMapper.update(employee);
    }

}
